Title | DIPOLAR DEPHASING BETWEEN QUADRUPOLAR AND SPIN-1/2 NUCLEI - REDOR AND TEDOR NMR EXPERIMENTS ON VPI-5 |
Publication Type | Journal Article |
Year of Publication | 1992 |
Authors | Fyfe, CA, Mueller, KT, Grondey, H, Wongmoon, KC |
Journal | Chemical Physics Letters |
Volume | 199 |
Pagination | 198-204 |
Date Published | Oct |
Type of Article | Article |
ISBN Number | 0009-2614 |
Keywords | ANGLE, COUPLINGS, DOUBLE-RESONANCE NMR, MAGIC, MAGNETIC-RESONANCE, SOLIDS, SPECTROSCOPY, TWO-DIMENSIONAL NMR |
Abstract | In this work we examine the use of dipolar-dephasing magic-angle spinning NMR to study mixed pairs of quadrupolar and spin-1/2 nuclei in solids. Dipolar connectivities are examined in both directions between the Al-27(I=5/2) and P-31(I=1/2) spins in the very large pore aluminophosphate VPI-5, which is considered representative of a range of inorganic framework materials. Rotational-echo double-resonance (REDOR) and transferred-echo double-resonance (TEDOR) experiments are demonstrated, as well as a two-dimensional extension of the TEDOR experiment. These experiments restore the heteronuclear dipolar coupling under MAS conditions via a train of radiofrequency pulses, thereby providing information about connectivities and distances between coupled nuclei in these inorganic solids. |
URL | <Go to ISI>://A1992JV10700030 |
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